Marl pulverizing and drying apparatus



(No Model.) 2 Sheets-Sheet I.

O. W. DOUGHTY. MARL PULVERIZING AND DRYING APPARATUS.

No. 495,153. Patented Apr. 11, 1893.

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(No Model.) 2 Sheets-Sheet V c. WIDOUGHTY. MARL PULVERIZING AND DRYING APPARATUS.

No. 495,153. Patented Apr. 11, 1893.

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UNITED STATES PATENT OFFICE.

CHARLES W. DOUGHTY, OF AUGUSTA, GEORGIA.

MARL PULVERIZING AND DRYING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 495,153, dated April 11, 1893.

Application filed June 14, 1892. serial No. 436,650. (No model.)

To all whom it may concern;

Be it known that I, CHARLES W. DOUGHTY, a citizen of the United States, residing at Augusta, in the county of Richmond and State-of Georgia, have invented certain new and useful Improvements in Marl Pulverizing and Drying Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to an apparatus for simultaneouslypulverizinganddryingmarl and other materials having substantially the same consistency; and the objects of my improvement are to produce an apparatus of simple construction to grind and dry the material, and in which or y-hydrocarbon is used as a fuel to dry the material thoroughly, while itis pulverized. I attain these objects by the construction illustrated in the accompanying drawings in which is indicated the main portion of the apparatus constructed in accordance with my invention.

In said drawings Figure 1 is a plan view of the lower story of the apparatus. Fig. 2 is a front elevation of the same. Fig. 3 is a longitudinal vertical section through the central drum and grinders of the apparatus. Fig. 4: is a transverse central section through the a pparatus. Fig. 5 is a plan view of a modified arrangement of the drum-driving chain.

In said drawings A represents a sheet metal drum or a series of them, arranged in a bench or row, each drum being supported at, or near each end, upon a pair of small rollers, a, mounted in suitable bearings 19 as usual. The supports for the bearings of the rollers a. are on a higher level at the front end of the drums than at the rear end, to have said drums sufiiciently inclined down toward the rear, to cause the marl, or other material dried and ground therein, to be automatically directed toward the rear or discharge end of the drums, by simply rotating them. To r0- tate the drums, one of them, preferably the central one is connected by means of a drivechain c, placed around it and in engagement with a sprocket wheel d mounted on said drum adjacent to its front end, with a sprocket wheel e mounted upon ashaft carrying a beltpulley E. Said pulley can be rotated by means of a belt from a suitably located driving pulley. The central drum carries also thereon, a series of -sprocket wheels upon which drive chains 0 are placed to transmit motion to the other drums by means of sprocket-wheels mounted upon the latter.

Each drum has mounted on its rear end a cylindrical screen A to separate the finely pulverized marl capable of passin through its meshes, from the coarser portion that is thus directed out through the tail-end of the screens.

The marl, or other material to be dried and ground, is first carried up on top of the second floor D of the building, in which the apparatus is located, by means of suitably operated carrying-belts or other well known means. From said floor the material is gradually dumped or poured into funnels F, placed in said floor. Each funnel has in its lower end a spoutf, the lower end of which is suitably bent or inclined to enter the mouth or upper end of each drum. Said mouth is formed by inwardly flanging the upper end of the drum or providing it with a centrally perforated disk A to prevent the material from escaping at that end.

To pulverize the material received in the drums, each drum is provided with aseries of Weights or grinders G, that may be cylindrical, but are preferably slightly conical, or in the form of truncated cones, to facilitate their climbing upon the material slowly descending within the drum. The upper or smaller end of the grinders is closed by head g, but the lower end is left open to give thereto more freedom of motion. The uppermost grinder is connected with the fore end of the drum by means of a bar h, extending diametrically across and secured to theinterior of the drum. Through the center of the bar 72, there is a perforation to receive loosely therein, the headed end of a rod 2', that passes loosely also through the centrally perforated head 9 of the first grinder. A length of pipe or sleeve Z0, is loosely mounted upon the rod 2', within the grinder, the forward end of said sleeve bearing against the inner surface of the head g. A split-key, j is inserted in a diamctrical perforation in the rear end of the rod 2'.

The successive grinders are each provided with a central rod having a head at the upper end, and a split-key at the lower end, and a sleeve is thereon, but said rods are shorter than the first rod 1;. To connect each grinder to the adjacent one a stirrup m, is used, the branches of which are perforated to receive the rods 11, one branch of said stirrup being placed on one of the rods t', under the head thereof, and the other branch receives the adjacent rod 4', at a point between the split-key and the lower end of the sleeve 7c.

To obtain the desired amount of heat to evaporate the moisture in the marl while being pulverized, the fuel preferred is a mixture of hydro-carbon-gas and air under pressure. For this purpose a gas pipe L, is laid at a suitable distance under the series of drums, and above it a pipe M, to contain air under pressure. The gas pipe has branch pipes Z, connecting with the air pipe under each drum and each pipe Z is controlled by a valve Z The mixture of air and gas is conducted into a pipe M placed under each drum, lengthwise, thereof, and said pipe M has a series of burners m to direct the flame thereof against the under side of each drum. The caloric of the flame is nearly all absorbed by the sheet metal of the drum and its contents, but a portion of the product of combustion is carried up a flue N in the center of the ceiling'of the drum-chamber P. To prevent any waste of caloric in said products of combustion, the flue N, has a damper n, and under said damper, a lateral flue N to direct said products into the eye of the fan Q, and from said fan they are conducted by means of a large pipe Q alongside of the rear ends of the drums, and branch pipes q issuing from the pipe Q direct said products Within each drum in contact with the grinders and with the material operated upon. The products of combustion and the steam or damp vapors removed from the material escape at the front end of each drum through pipes R, each having a conical funnel r, at its lower end, a short distance above the open mouth of the drums. The pipes R, pass through the ceiling of the lower room and of the room above it, to the open air.

In the arrangement shown in Fig. 5, motion is transmitted to the central drum A by the chain c; and from said drum, motion is transmitted to all the other drums by means of an endless chain 0 in engagement with a sprocket wheel on each drum; a roller-follower 8, bearing upon the chain between said drums to increase its engagement with each sprocket wheel. In place of transmitting the initial motion to the central drum, said motion may be given to any other of the drums and thence transmitted to the other by the drive-chain 0 Having now fully described my invention, I claim 1. The combination of a series of drums mounted on rollers at each end thereof, each drum having a sprocket-wheel mounted thereon, chains uniting said drums together, a funnel and spout leading into the mouth of each drum, an inverted funnel and pipe above said mouths, regulable heat-producers under the drums and the walls and the ceiling of a heating chamber inclosing said drums substantially as described.

2. The combination of a series of drums mounted upon rollers at each end thereof, each d rum having a sprocket-wheel mounted thereon, driving-chains uniting said drums together, a funnel and spout leading into the mouth of each drum, inverted funnels and pipes above said mouths, a regulable gas pipe and air pipe having burners under the drums, the walls and ceiling of a heating chamber inclosing said drums, a flue N in said ceiling, a fan, a pipe N leading from the flue N, into said fan and a pipe Q leading from said fan and having a branch pipe entering the tail end of each drum substantially as described.

3. The combination of a revoluble cylinder, a bar h, having its ends'secured within said cylinder and a perforation in the center thereof, a headed rod 2', passing through said perforation, and having its head resting against the bar h, and its opposite end received in a revoluble grinder, a sleeve upon said rod, a stirrup having one end mounted upon the rear end of the rod and a series of grinders each having a central rod and a sleeve thereon substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES WV. DOUGHTY.

Witnesses:

EDWARD RECORDS, H. B. J OSLIN. 

